Travels in Alaska

by John Muir

Chapter XVIII

My Sled-Trip On the Muir Glacier

I started off the morning of July 11 on my memorable sled-trip to obtain general views of the main upper part of the Muir Glacier and its seven principal tributaries, feeling sure that I would learn something and at the same time get rid of a severe bronchial cough that followed an attack of the grippe and had troubled me for three months. I intended to camp on the glacier every night, and did so, and my throat grew better every day until it was well, for no lowland microbe could stand such a trip. My sled was about three feet long and made as light as possible. A sack of hardtack, a little tea and sugar, and a sleeping-bag were firmly lashed on it so that nothing could drop off however much it might be jarred and dangled in crossing crevasses.

Two Indians carried the baggage over the rocky moraine to the clear glacier at the side of one of the eastern Nunatak Islands. Mr. Loomis accompanied me to this first camp and assisted in dragging the empty sled over the moraine. We arrived at the middle Nunatak Island about nine o'clock. Here I sent back my Indian carriers, and Mr. Loomis assisted me the first day in hauling the loaded sled to my second camp at the foot of Hemlock Mountain, returning the next morning.

July 13. I skirted the mountain to eastward a few miles and was delighted to discover a group of trees high up on its ragged rocky side, the first trees I had seen on the shores of Glacier Bay or on those of any of its glaciers. I left my sled on the ice and climbed the mountain to see what I might learn. I found that all the trees were mountain hemlock (Tsuga mertensiana), and were evidently the remnant of an old well-established forest, standing on the only ground that was stable, all the rest of the forest below it having been sloughed off with the soil from the disintegrating slate bed rock. The lowest of the trees stood at an elevation of about two thousand feet above the sea, the highest at about three thousand feet or a little higher. Nothing could be more striking than the contrast between the raw, crumbling, deforested portions of the mountain, looking like a quarry that was being worked, and the forested part with its rich, shaggy beds of cassiope and bryanthus in full bloom, and its sumptuous cushions of flower-enameled mosses. These garden-patches are full of gay colors of gentian, erigeron, anemone, larkspur, and columbine, and are enlivened with happy birds and bees and marmots. Climbing to an elevation of twenty-five hundred feet, which is about fifteen hundred feet above the level of the glacier at this point, I saw and heard a few marmots, and three ptarmigans that were as tame as barnyard fowls. The sod is sloughing off on the edges, keeping it ragged. The trees are storm-bent from the southeast. A few are standing at an elevation of nearly three thousand feet; at twenty-five hundred feet, pyrola, veratrum, vaccinium, fine grasses, sedges, willows, mountain-ash, buttercups, and acres of the most luxuriant cassiope are in bloom.

A lake encumbered with icebergs lies at the end of Divide Glacier. A spacious, level-floored valley beyond it, eight or ten miles long, with forested mountains on its west side, perhaps discharges to the southeastward into Lynn Canal. The divide of the glacier is about opposite the third of the eastern tributaries. Another berg-dotted lake into which the drainage of the Braided Glacier flows, lies a few miles to the westward and is one and a half miles long. Berg Lake is next the remarkable Girdled Glacier to the southeastward.

When the ice-period was in its prime, much of the Muir Glacier that now flows northward into Howling Valley flowed southward into Glacier Bay as a tributary of the Muir. All the rock contours show this, and so do the medial moraines. Berg Lake is crowded with bergs because they have no outlet and melt slowly. I heard none discharged. I had a hard time crossing the Divide Glacier, on which I camped. Half a mile back from the lake I gleaned a little fossil wood and made a fire on moraine boulders for tea. I slept fairly well on the sled. I heard the roar of four cascades on a shaggy green mountain on the west side of Howling Valley and saw three wild goats fifteen hundred feet up in the steep grassy pastures.

July 14. I rose at four o'clock this cloudy and dismal morning and looked for my goats, but saw only one. I thought there must be wolves where there were goats, and in a few minutes heard their low, dismal, far-reaching howling. One of them sounded very near and came nearer until it seemed to be less than a quarter of a mile away on the edge of the glacier. They had evidently seen me, and one or more had come down to observe me, but I was unable to catch sight of any of them. About half an hour later, while I was eating breakfast, they began howling again, so near I began to fear they had a mind to attack me, and I made haste to the shelter of a big square boulder, where, though I had no gun, I might be able to defend myself from a front attack with my alpenstock. After waiting half an hour or so to see what these wild dogs meant to do, I ventured to proceed on my journey to the foot of Snow Dome, where I camped for the night.

There are six tributaries on the northwest side of Divide arm, counting to the Gray Glacier, next after Granite Cañon Glacier going northwest. Next is Dirt Glacier, which is dead. I saw bergs on the edge of the main glacier a mile back from here which seem to have been left by the draining of a pool in a sunken hollow. A circling rim of driftwood, back twenty rods on the glacier, marks the edge of the lakelet shore where the bergs lie scattered and stranded. It is now half past ten o'clock and getting dusk as I sit by my little fossil-wood fire writing these notes. A strange bird is calling and complaining. A stream is rushing into a glacier well on the edge of which I am camped, back a few yards from the base of the mountain for fear of falling stones. A few small ones are rattling down the steep slope. I must go to bed.

July 15. I climbed the dome to plan a way, scan the glacier, and take bearings, etc., in case of storms. The main divide is about fifteen hundred feet; the second divide, about fifteen hundred also, is about one and one half miles southeastward. The flow of water on the glacier noticeably diminished last night though there was no frost. It is now already increasing. Stones begin to roll into the crevasses and into new positions, sliding against each other, half turning over or falling on moraine ridges. Mud pellets with small pebbles slip and roll slowly from ice-hummocks again and again. How often and by how many ways are boulders finished and finally brought to anything like permanent form and place in beds for farms and fields, forests and gardens. Into crevasses and out again, into moraines, shifted and reinforced and reformed by avalanches, melting from pedestals, etc. Rain, frost, and dew help in the work; they are swept in rills, caught and ground in pot-hole mills. Moraines of washed pebbles, like those on glacier margins, are formed by snow avalanches deposited in crevasses, then weathered out and projected on the ice as shallow raised moraines. There is one such at this camp.

A ptarmigan is on a rock twenty yards distant, as if on show. It has red over the eye, a white line, not conspicuous, over the red, belly white, white markings over the upper parts on ground of brown and black wings, mostly white as seen when flying, but the coverts the same as the rest of the body. Only about three inches of the folded primaries show white. The breast seems to have golden iridescent colors, white under the wings. It allowed me to approach within twenty feet. It walked down a sixty degree slope of the rock, took flight with a few whirring wing-beats, then sailed with wings perfectly motionless four hundred yards down a gentle grade, and vanished over the brow of a cliff. Ten days ago Loomis told me that he found a nest with nine eggs. On the way down to my sled I saw four more ptarmigans. They utter harsh notes when alarmed. "Crack, chuck, crack," with the r rolled and prolonged. I also saw fresh and old goat-tracks and some bones that suggest wolves.

There is a pass through the mountains at the head of the third glacier. Fine mountains stand at the head on each side. The one on the northeast side is the higher and finer every way. It has three glaciers, tributary to the third. The third glacier has altogether ten tributaries, five on each side. The mountain on the left side of White Glacier is about six thousand feet high. The moraines of Girdled Glacier seem scarce to run anywhere. Only a little material is carried to Berg Lake. Most of it seems to be at rest as a terminal on the main glacier-field, which here has little motion. The curves of these last as seen from this mountain-top are very beautiful.

It has been a glorious day, all pure sunshine. An hour or more before sunset the distant mountains, a vast host, seemed more softly ethereal than ever, pale blue, ineffably fine, all angles and harshness melted off in the soft evening light. Even the snow and the grinding, cascading glaciers became divinely tender and fine in this celestial amethystine light. I got back to camp at 7.15, not tired. After my hardtack supper I could have climbed the mountain again and got back before sunrise, but dragging the sled tires me. I have been out on the glacier examining a moraine-like mass about a third of a mile from camp. It is perhaps a mile long, a hundred yards wide, and is thickly strewn with wood. I think that it has been brought down the mountain by a heavy snow avalanche, loaded on the ice, then carried away from the shore in the direction of the flow of the glacier. This explains detached moraine-masses. This one seems to have been derived from a big roomy cirque or amphitheatre on the northwest side of this Snow Dome Mountain.

To shorten the return journey I was tempted to glissade down what appeared to be a snow-filled ravine, which was very steep. All went well until I reached a bluish spot which proved to be ice, on which I lost control of myself and rolled into a gravel talus at the foot without a scratch. Just as I got up and was getting myself orientated, I heard a loud fierce scream, uttered in an exulting, diabolical tone of voice which startled me, as if an enemy, having seen me fall, was glorying in my death. Then suddenly two ravens came swooping from the sky and alighted on the jag of a rock within a few feet of me, evidently hoping that I had been maimed and that they were going to have a feast. But as they stared at me, studying my condition, impatiently waiting for bone-picking time, I saw what they were up to and shouted, "Not yet, not yet!"

July 16. At 7 A.M. I left camp to cross the main glacier. Six ravens came to the camp as soon as I left. What wonderful eyes they must have! Nothing that moves in all this icy wilderness escapes the eyes of these brave birds. This is one of the loveliest mornings I ever saw in Alaska; not a cloud or faintest hint of one in all the wide sky. There is a yellowish haze in the east, white in the west, mild and mellow as a Wisconsin Indian Summer, but finer, more ethereal, God's holy light making all divine.

In an hour or so I came to the confluence of the first of the seven grand tributaries of the main Muir Glacier and had a glorious view of it as it comes sweeping down in wild cascades from its magnificent, pure white, mountain-girt basin to join the main crystal sea, its many fountain peaks, clustered and crowded, all pouring forth their tribute to swell its grand current. I crossed its front a little below its confluence, where its shattered current, about two or three miles wide, is reunited, and many rills and good-sized brooks glide gurgling and ringing in pure blue channels, giving delightful animation to the icy solitude.

Most of the ice-surface crossed to-day has been very uneven, and hauling the sled and finding a way over hummocks has been fatiguing. At times I had to lift the sled bodily and to cross many narrow, nerve-trying, ice-sliver bridges, balancing astride of them, and cautiously shoving the sled ahead of me with tremendous chasms on either side. I had made perhaps not more than six or eight miles in a straight line by six o'clock this evening when I reached ice so hummocky and tedious I concluded to camp and not try to take the sled any farther. I intend to leave it here in the middle of the basin and carry my sleeping-bag and provisions the rest of the way across to the west side. I am cozy and comfortable here resting in the midst of glorious icy scenery, though very tired. I made out to get a cup of tea by means of a few shavings and splinters whittled from the bottom board of my sled, and made a fire in a little can, a small campfire, the smallest I ever made or saw, yet it answered well enough as far as tea was concerned. I crept into my sack before eight o'clock as the wind was cold and my feet wet. One of my shoes is about worn out. I may have to put on a wooden sole. This day has been cloudless throughout, with lovely sunshine, a purple evening and morning. The circumference of mountains beheld from the midst of this world of ice is marvelous, the vast plain reposing in such soft tender light, the fountain mountains so clearly cut, holding themselves aloft with their loads of ice in supreme strength and beauty of architecture. I found a skull and most of the other bones of a goat on the glacier about two miles from the nearest land. It had probably been chased out of its mountain home by wolves and devoured here. I carried its horns with me. I saw many considerable depressions in the glacial surface, also a pitlike hole, irregular, not like the ordinary wells along the slope of the many small dirt-clad hillocks, faced to the south. Now the sun is down and the sky is saffron yellow, blending and fading into purple around to the south and north. It is a curious experience to be lying in bed writing these notes, hummock waves rising in every direction, their edges marking a multitude of crevasses and pits, while all around the horizon rise peaks innumerable of most intricate style of architecture. Solemnly growling and grinding moulins contrast with the sweet low-voiced whispering and warbling of a network of rills, singing like water-ouzels, glinting, gliding with indescribable softness and sweetness of voice. They are all around, one within a few feet of my hard sled bed.

July 17. Another glorious cloudless day is dawning in yellow and purple and soon the sun over the eastern peak will blot out the blue peak shadows and make all the vast white ice prairie sparkle. I slept well last night in the middle of the icy sea. The wind was cold but my sleeping-bag enabled me to lie neither warm nor intolerably cold. My three-months cough is gone. Strange that with such work and exposure one should know nothing of sore throats and of what are called colds. My heavy, thick-soled shoes, resoled just before starting on the trip six days ago, are about worn out and my feet have been wet every night. But no harm comes of it, nothing but good. I succeeded in getting a warm breakfast in bed. I reached over the edge of my sled, got hold of a small cedar stick that I had been carrying, whittled a lot of thin shavings from it, stored them on my breast, then set fire to a piece of paper in a shallow tin can, added a pinch of shavings, held the cup of water that always stood at my bedside over the tiny blaze with one hand, and fed the fire by adding little pinches of shavings until the water boiled, then pulling my bread sack within reach, made a good warm breakfast, cooked and eaten in bed. Thus refreshed, I surveyed the wilderness of crevassed, hummocky ice and concluded to try to drag my little sled a mile or two farther, then, finding encouragement, persevered, getting it across innumerable crevasses and streams and around several lakes and over and through the midst of hummocks, and at length reached the western shore between five and six o'clock this evening, extremely fatigued. This I consider a hard job well done, crossing so wildly broken a glacier, fifteen miles of it from Snow Dome Mountain, in two days with a sled weighing altogether not less than a hundred pounds. I found innumerable crevasses, some of them brimful of water. I crossed in most places just where the ice was close pressed and welded after descending cascades and was being shoved over an upward slope, thus closing the crevasses at the bottom, leaving only the upper sun-melted beveled portion open for water to collect in.

Vast must be the drainage from this great basin. The waste in sunshine must be enormous, while in dark weather rains and winds also melt the ice and add to the volume produced by the rain itself. The winds also, though in temperature they may be only a degree or two above freezing-point, dissolve the ice as fast, or perhaps faster, than clear sunshine. Much of the water caught in tight crevasses doubtless freezes during the winter and gives rise to many of the irregular veins seen in the structure of the glacier. Saturated snow also freezes at times and is incorporated with the ice, as only from the lower part of the glacier is the snow melted during the summer. I have noticed many traces of this action. One of the most beautiful things to be seen on the glacier is the myriads of minute and intensely brilliant radiant lights burning in rows on the banks of streams and pools and lakelets from the tips of crystals melting in the sun, making them look as if bordered with diamonds. These gems are rayed like stars and twinkle; no diamond radiates keener or more brilliant light. It was perfectly glorious to think of this divine light burning over all this vast crystal sea in such ineffably fine effulgence, and over how many other of icy Alaska's glaciers where nobody sees it. To produce these effects I fancy the ice must be melting rapidly, as it was being melted to-day. The ice in these pools does not melt with anything like an even surface, but in long branches and leaves, making fairy forests of points, while minute bubbles of air are constantly being set free. I am camped to-night on what I call Quarry Mountain from its raw, loose, plantless condition, seven or Bight miles above the front of the glacier. I found enough fossil wood for tea. Glorious is the view to the eastward from this camp. The sun has set, a few clouds appear, and a torrent rushing down a gully and under the edge of the glacier is making a solemn roaring. No tinkling, whistling rills this night. Ever and anon I hear a falling boulder. I have had a glorious and instructive day, but am excessively weary and to bed I go.

July 18. I felt tired this morning and meant to rest to-day. But after breakfast at 8 A.M. I felt I must be up and doing, climbing, sketching new views up the great tributaries from the top of Quarry Mountain. Weariness vanished and I could have climbed, I think, five thousand feet. Anything seems easy after sled-dragging over hummocks and crevasses, and the constant nerve-strain in jumping crevasses so as not to slip in making the spring. Quarry Mountain is the barest I have seen, a raw quarry with infinite abundance of loose decaying granite all on the go. Its slopes are excessively steep. A few patches of epilobium make gay purple spots of color. Its seeds fly everywhere seeking homes. Quarry Mountain is cut across into a series of parallel ridges by oversweeping ice. It is still overswept in three places by glacial flows a half to three quarters of a mile wide, finely arched at the top of the divides. I have been sketching, though my eyes are much inflamed and I can scarce see. All the lines I make appear double. I fear I shall not be able to make the few more sketches I want to-morrow, but must try. The day has been gloriously sunful, the glacier pale yellow toward five o'clock. The hazy air, white with a yellow tinge, gives an Indian-summerish effect. Now the blue evening shadows are creeping out over the icy plain, some ten miles long, with sunny yellow belts between them. Boulders fall now and again with dull, blunt booming, and the gravel pebbles rattle.

July 19. Nearly blind. The light is intolerable and I fear I may be long unfitted for work. I have been lying on my back all day with a snow poultice bound over my eyes. Every object I try to look at seems double; even the distant mountain-ranges are doubled, the upper an exact copy of the lower, though somewhat faint. This is the first time in Alaska that I have had too much sunshine. About four o'clock this afternoon, when I was waiting for the evening shadows to enable me to get nearer the main camp, where I could be more easily found in case my eyes should become still more inflamed and I should be unable to travel, thin clouds cast a grateful shade over all the glowing landscape. I gladly took advantage of these kindly clouds to make an effort to cross the few miles of the glacier that lay between me and the shore of the inlet. I made a pair of goggles but am afraid to wear them. Fortunately the ice here is but little broken, therefore I pulled my cap well down and set off about five o'clock. I got on pretty well and camped on the glacier in sight of the main camp, which from here in a straight line is only five or six miles away. I went ashore on Granite Island and gleaned a little fossil wood with which I made tea on the ice.

July 20. I kept wet bandages on my eyes last night as long as I could, and feel better this morning, but all the mountains still seem to have double summits, giving a curiously unreal aspect to the landscape. I packed everything on the sled and moved three miles farther down the glacier, where I want to make measurements. Twice to-day I was visited on the ice by a hummingbird, attracted by the red lining of the bearskin sleeping-bag.

I have gained some light on the formation of gravel-beds along the inlet. The material is mostly sifted and sorted by successive railings and washings along the margins of the glacier-tributaries, where the supply is abundant beyond anything I ever saw elsewhere. The lowering of the surface of a glacier when its walls are not too steep leaves a part of the margin dead and buried and protected from the wasting sunshine beneath the lateral moraines. Thus a marginal valley is formed, clear ice on one side, or nearly so, buried ice on the other. As melting goes on, the marginal trough, or valley, grows deeper and wider, since both sides are being melted, the land side slower. The dead, protected ice in melting first sheds off the large boulders, as they are not able to lie on slopes where smaller ones can. Then the next larger ones are rolled off, and pebbles and sand in succession. Meanwhile this material is subjected to torrent-action, as if it were cast into a trough. When floods come it is carried forward and stratified, according to the force of the current, sand, mud, or larger material. This exposes fresh surfaces of ice and melting goes on again, until enough material has been undermined to form a veil in front; then follows another washing and carrying-away and depositing where the current is allowed to spread. In melting, protected margin terraces are oftentimes formed. Perhaps these terraces mark successive heights of the glacial surface. From terrace to terrace the grist of stone is rolled and sifted. Some, meeting only feeble streams, have only the fine particles carried away and deposited in smooth beds; others, coarser, from swifter streams, overspread the fine beds, while many of the large boulders no doubt roll back upon the glacier to go on their travels again.

It has been cloudy mostly to-day, though sunny in the afternoon, and my eyes are getting better. The steamer Queen is expected in a day or two, so I must try to get down to the inlet to-morrow and make signal to have some of the Reid party ferry me over. I must hear from home, write letters, get rest and more to eat.

Near the front of the glacier the ice was perfectly free, apparently, of anything like a crevasse, and in walking almost carelessly down it I stopped opposite the large granite Nunatak Island, thinking that I would there be partly sheltered from the wind. I had not gone a dozen steps toward the island when I suddenly dropped into a concealed water-filled crevasse, which on the surface showed not the slightest sign of its existence. This crevasse like many others was being used as the channel of a stream, and at some narrow point the small cubical masses of ice into which the glacier surface disintegrates were jammed and extended back farther and farther till they completely covered and concealed the water. Into this I suddenly plunged, after crossing thousands of really dangerous crevasses, but never before had I encountered a danger so completely concealed. Down I plunged over head and ears, but of course bobbed up again, and after a hard struggle succeeded in dragging myself out over the farther side. Then I pulled my sled over close to Nunatak cliff, made haste to strip off my clothing, threw it in a sloppy heap and crept into my sleeping-bag to shiver away the night as best I could.

July 21. Dressing this rainy morning was a miserable job, but might have been worse. After wringing my sloppy underclothing, getting it on was far from pleasant. My eyes are better and I feel no bad effect from my icy bath. The last trace of my three months' cough is gone. No lowland grippe microbe could survive such experiences.

I have had a fine telling day examining the ruins of the old forest of Sitka spruce that no great time ago grew in a shallow mud-filled basin near the southwest corner of the glacier. The trees were protected by a spur of the mountain that puts out here, and when the glacier advanced they were simply flooded with fine sand and overborne. Stumps by the hundred, three to fifteen feet high, rooted in a stream of fine blue mud on cobbles, still have their bark on. A stratum of decomposed bark, leaves, cones, and old trunks is still in place. Some of the stumps are on rocky ridges of gravelly soil about one hundred and twenty-five feet above the sea. The valley has been washed out by the stream now occupying it, one of the glacier's draining streams a mile long or more and an eighth of a mile wide.

I got supper early and was just going to bed, when I was startled by seeing a man coming across the moraine, Professor Reid, who had seen me from the main camp and who came with Mr. Loomis and the cook in their boat to ferry me over. I had not intended making signals for them until to-morrow but was glad to go. I had been seen also by Mr. Case and one of his companions, who were on the western mountain-side above the fossil forest, shooting ptarmigans. I had a good rest and sleep and leisure to find out how rich I was in new facts and pictures and how tired and hungry I was.

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